ABSTRACT
Objective To investigate the variation patterm in activity concentration of 210Pb in atmospheric aerosol in Qindao and evaluate its internal radiation effect to human body.Methods 210Pb activity concentration of aerosol samples was measured by high purity germanium(HPGe) γ spectrometer for purpose of ascertaining its variation in aerosol in Qingdao from April 2015 to March 2016.Results 210Pb activity concentration in aerosol varied from 0.06 to 1.61 mBq/m3 and the mean of (0.70 ± 0.50) mBq/m3,slightly higher than the UNSECAR 1988 report recommended value of O.50 mBq/m3.In this study,210Pb activity concentration in aerosol was high from December 2015 to February 2016 and low from August to November.Radiation dose assessment revealed that the annual committed effective dose to adults delivered by 210Pb was 6.35 × 10-6 Sv.The monthly variation in activity concentration variation of 210Pb in atmospheric aerosol in Qingdao was similar as in Xiamen.Conclusions Activity concentration of 210Pb in atmospheric aerosols in Qingdao varied largely dependent on atmospheric environmental pollution.210Pb contributed less to the adult annual committed effective dose.However,more attention should be drawn to the long-term radiation effects to aduhs due to the 210Pb potentially deposited in lungs.